I would like to take this time to let you know to take everything that I have talked about so far with a grain of salt because remember, I am not a professional architect or anything like that with any formal training and everything comes from my personal experiences and opinions.
On the last one I talked about what other materials you can use for certain buildings or houses instead of using wood, but that one actually does come from a little bit of experience from my job working for a home restoration company.
Licensed & Insured
So unless you are a professional yourself or have had some formal training and/or education, you should always use contractors that are licensed & insured for any and all work that you have done on a home or office building. There are a lot of companies out there who like to advertise that they have all of their paperwork in order and up to date, but unfortunately that can mean a lot of different things and is not always as sure fire as they like to make it sound.
Although you can take some of what I have talked about on here into consideration, you probably shouldn’t do more than that. There are a million different companies out there that do all kinds of repair or remodeling work who have years of work and experience under their belt. These are the guys you need to listen to closely.